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Finding the Fourth Proportional to 15,213.68, 20,994.72 and 8,924.84

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Solution

The fourth proportional to 15,213.68, 20,994.72 and 8,924.84 is: 12,316.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,213.68 : 20,994.72 = 8,924.84 : x
  2. Step 2: Convert to fraction form
    15,213.68/20,994.72 = 8,924.84/x
  3. Step 3: Cross multiply
    15,213.68x = 20,994.72 × 8,924.84
  4. Step 4: Simplify right side
    15,213.68x = 187,374,516.84
  5. Step 5: Solve for x
    x = 187,374,516.84/15,213.68
  6. Step 6: Final answer
    x = 12,316.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.